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利用程序升温还原法以正己烷作为碳源制备了SAPO-11负载碳化钼催化剂。XRD分析表明,经氢气还原催化剂中的钼相已转变成具有异构化活性的β-Mo_2C。通过连续流动固定床反应装置,以正己烷为模型反应物,考察了反应温度、压力、空速和氢烃体积比对β-Mo_2C/SAPO-11催化剂临氢异构化反应性能的影响。结果表明,SAPO-11负载碳化钼催化剂上的正己烷异构化的最适宜反应条件为温度380℃、压力1.5 MPa、体积空速1.0h~(-1)、氢烃体积比200:1。在该条件下,当反应物转化率为82.19%时,异构物选择性和收率分别达到73.57%和60.47%。
The SAPO-11 supported molybdenum carbide catalyst was prepared by temperature-programmed reduction method using n-hexane as carbon source. XRD analysis showed that the molybdenum phase in the hydrogen reduction catalyst has been transformed into β-Mo_2C with isomerization activity. The effects of reaction temperature, pressure, space velocity and volume fraction of hydrogen on hydroisomerization of β-Mo_2C / SAPO-11 catalyst were investigated by continuous flow fixed bed reactor and n-hexane as model reactant. The results showed that the most suitable reaction conditions for n-hexane isomerization on SAPO-11 supported Molybdenum carbide catalyst were temperature 380 ℃, pressure 1.5 MPa, volume space velocity 1.0 h -1, volume ratio of hydrogen to hydrocarbon 200: 1. Under the conditions, when the conversion of the reactants was 82.19%, the selectivity and yield of the isomers reached 73.57% and 60.47% respectively.